LPU-2428 Loop Powered Ultrasonic Level Sensors with microprocessor control internally perform volume, flow, and to-talization calculations. These IP65-rated sensors provide a one to 25-foot (0.3 to 7.62 m) detection range. They are spe-cifically designed for liquid flow-rate and volume measurement applications, and are also a good solution for determining distance and level. For determining flow rates, formulas for a variety of flumes and weirs are built into the sensors. These include Parshall flumes, cut-throat flumes, California-pipe weirs, rectangular weirs, and v-notch weirs.